United States Engineer Regiments in World War II

This is a list of known United States Engineer Regiments in existence at the time of World War II.

Regiments in existence prior to World War II

Designation, configuration, and higher headquarters assignment are the most recent ones prior to U.S. entry into World War II

1st Engineer Regiment on 12 October 1939 and regiment disbanded on 16 October 1939
2nd Engineer Regiment on 12 October 1939 and regiment disbanded on 16 October 1939
3rd Engineer Regiment on 26 September 1941 and assigned to the 24th Infantry Division
4th Engineer Regiment on 19 October 1939
5th Engineer Regiment
6th Engineer Regiment - 1st Battalion redesignated 6th Engineer Battalion 12 October 1939, 2nd Battalion redesignated 10th Engineer Battalion 13 October 1939 and relieved from the 3rd Division, and remainder of regiment disbanded
7th Engineer Regiment - Regiment reorganized and redesignated as the 7th Engineer Battalion 16 October 1939
10th Engineer Regiment - Disbanded 14 October 1939
11th Engineer Regiment
14th Engineer Regiment
15th Engineer Regiment
16th Engineer Regiment - Withdrawn from the Panama Canal Department 15 July 1940. Concurrently, reorganized and redesignated as the 16th Engineer Battalion, assigned to the 1st Armored Division, and activated at Fort Knox, Kentucky, from personnel and assets of the 47th Engineer Troop.
18th Engineer Regiment
19th Engineer Regiment
20th Engineer Regiment
21st Engineer Regiment - Redesignated 4 June 1940 as the 21st Engineer Regiment, relieved from the IV Corps, and assigned to the General Headquarters Air Force.
22nd Engineer Regiment - Redesignated 22nd Engineer Battalion 28 August 1941 and assigned to the 5th Armored Division
23rd Engineer Regiment - Redesignated 23rd Engineer Battalion 28 August 1941 and assigned to the 3rd Armored Division
24th Engineer Regiment - Redesignated as the 24th Engineer Battalion 16 December 1940 and assigned to the 4th Armored Division
25th Engineer Regiment - Redesignated as the 25th Engineer Battalion 28 August 1941 and assigned to the 6th Armored Division
26th Engineer Regiment - Inactive; disbanded 22 December 1942
34th Engineer Regiment
35th Engineer Regiment
36th Engineer Regiment
37th Engineer Regiment
38th Engineer Regiment
39th Engineer Regiment - Redesignated 19th Engineer Regiment 1 July 1940
41st Engineer General Service Regiment - to Liberia as part of U.S. Army Forces in Liberia under United States Army Forces in the Middle East.
42nd Engineer General Service Regiment - Redesignated 20th Engineer Regiment 1 July 1940
43rd Engineer General Service Regiment
44th Engineer General Service Regiment
45th Engineer General Service Regiment
46th Engineer General Service Regiment
47th Engineer General Service Regiment
78th Engineer Regiment
101st Engineer Regiment - 26th Division
102nd Engineer Regiment - 27th Division
103rd Engineer Regiment - 28th Division
104th Engineer Regiment - 44th Division
105th Engineer Regiment - 30th Division
106th Engineer Regiment - 31st Division
107th Engineer Regiment - 32nd Division
108th Engineer Regiment - 33rd Division
109th Engineer Regiment - 34th Division
110th Engineer Regiment - 35th Division
111th Engineer Regiment - 36th Division
112th Engineer Regiment - 37th Division
113th Engineer Regiment - 38th Division
115th Engineer Regiment
116th Engineer Regiment - 41st Division
118th Engineer Regiment - 43rd Division
120th Engineer Regiment - 45th Division
121st Engineer Regiment - 29th Division

Regiments formed during wartime

44th Engineer Regiment
45th Engineer General Service Regiment
48th Engineer Regiment
49th Engineer Regiment
50th Engineer Regiment
51st Engineer Regiment
52nd Engineer Regiment
79th Engineer Regiment
82nd Engineer Regiment
91st Engineer General Service Regiment
92nd Engineer General Service Regiment
93rd Engineer General Service Regiment
94th Engineer General Service Regiment
95th Engineer General Service Regiment
96th Engineer General Service Regiment
97th Engineer General Service Regiment
98th Engineer General Service Regiment
130th Engineer Regiment
131st Engineer Regiment
132nd Engineer Regiment
133rd Engineer Regiment
134th Engineer Regiment
135th Engineer Regiment
146th Engineer Regiment
147th Engineer Regiment
151st Engineer Regiment
152nd Engineer Regiment
175th Engineer General Service Regiment
176th Engineer General Service Regiment
177th Engineer General Service Regiment
224th Engineer General Service Regiment
226th Engineer General Service Regiment
330th Engineer General Service Regiment
332nd Engineer General Service Regiment
333rd Engineer Special Service Regiment
334th Engineer Special Service Regiment
337th Engineer General Service Regiment
338th Engineer General Service Regiment
340th Engineer General Service Regiment
341st Engineer General Service Regiment
342nd Engineer General Service Regiment
343rd Engineer General Service Regiment
344th Engineer General Service Regiment
345th Engineer General Service Regiment
346th Engineer General Service Regiment
348th Engineer General Service Regiment
349th Engineer General Service Regiment
350th Engineer General Service Regiment
351st Engineer General Service Regiment
352nd Engineer General Service Regiment
354th Engineer General Service Regiment
355th Engineer General Service Regiment
356th Engineer General Service Regiment
357th Engineer General Service Regiment
358th Engineer General Service Regiment
359th Engineer General Service Regiment
360th Engineer General Service Regiment
361st Engineer Special Service Regiment
362nd Engineer General Service Regiment
363rd Engineer Special Service Regiment
364th Engineer General Service Regiment
365th Engineer General Service Regiment
366th Engineer General Service Regiment
367th Engineer Special Service Regiment
368th Engineer General Service Regiment
369th Engineer Special Service Regiment
370th Engineer Special Service Regiment
371st Engineer General Service Regiment
372nd Engineer General Service Regiment
373rd Engineer General Service Regiment
374th Engineer General Service Regiment
375th Engineer General Service Regiment
377th Engineer General Service Regiment
388th Engineer General Service Regiment
389th Engineer General Service Regiment
390th Engineer General Service Regiment
392nd Engineer General Service Regiment
393rd Engineer Special Service Regiment
398th Engineer General Service Regiment
531st Engineer Shore Regiment
532nd Engineer Boat and Shore Regiment
534th Engineer Boat and Shore Regiment
540th Engineer Shore Regiment
542nd Engineer Boat and Shore Regiment
543rd Engineer Boat and Shore Regiment
544th Engineer Boat and Shore Regiment
591st Engineer Boat Regiment
592nd Engineer Boat and Shore Regiment
594th Engineer Boat and Shore Regiment
929th Engineer Aviation Regiment
930th Engineer Aviation Regiment
931st Engineer Aviation Regiment
932nd Engineer Aviation Regiment
1303rd Engineer General Service Regiment
1307th Engineer General Service Regiment
1310th Engineer General Service Regiment
1311th Engineer General Service Regiment
1312th Engineer General Service Regiment
1313th Engineer General Service Regiment
1314th Engineer General Service Regiment
1315th Engineer General Service Regiment
1316th Engineer General Service Regiment
1317th Engineer General Service Regiment
1318th Engineer General Service Regiment
1319th Engineer General Service Regiment
1320th Engineer General Service Regiment
1321st Engineer General Service Regiment
1322nd Engineer General Service Regiment
1323rd Engineer General Service Regiment
1324th Engineer General Service Regiment
1325th Engineer General Service Regiment
1326th Engineer General Service Regiment
1327th Engineer General Service Regiment
1329th Engineer General Service Regiment
1330th Engineer General Service Regiment
1331st Engineer General Service Regiment
1332nd Engineer General Service Regiment
1333rd Engineer General Service Regiment
1334th Engineer General Service Regiment
1349th Engineer General Service Regiment
1749th Engineer General Service Regiment
2201st Engineer Aviation Regiment
2822nd Engineer General Service Regiment